If a customer needs a master cylinder, slave cylinder or hydraulic throw-out bearing, you should recommend replacing all of the components at the same time. Replacing the whole system will restore the system to like-new condition and save the vehicle owner the inconvenience and cost of having to fix the clutch linkage again in the near future.
Customers who are replacing a clutch should also be advised to carefully inspect the hydraulic clutch linkage for leaks and check the fluid for signs of corrosion or contamination. If any problems are found, the system should be replaced.